test: improve test coverage

Description

This MR adds comprehensive pytest test cases to improve code coverage.

The goal is to achieve higher (target 100%) test coverage without modifying any existing application logic or functionality.

Changes Made

• Added new test file:

  • tests/test_app.py

• Updated and added test cases in:

  • tests/test_client.py
  • tests/test_repro_timeout.py

• Ensured execution of app.py through mocked Streamlit components

• Added mocks for external dependencies (e.g., GitLab, async calls)

• Covered:

  • Normal execution paths
  • Conditional branches (if/else)
  • Edge cases
  • Exception handling paths

Key Points

• No changes were made to production code
• All functionality remains unchanged
• Tests are fully isolated using mocking
• No real API calls or UI rendering during tests

How to Test

Run the following command:

pytest --cov=.

Expected Result

• Increased coverage for:
  • tests/test_client.py
  • tests/test_repro_timeout.py
• Target: 100% coverage